Why my interface speed has a max value of 4.29G?

[baalchina]

Hi all, I have some switches or firewalls, which motintor with 'Template Net Network Generic Device SNMP'.

Some of my interfaces are 10GE ,or 2*10GE as a agg port, so the real bandwidth is 10G or 20G, but with the 'Template Net Network Generic Device SNMP', I got a speed of 4.29G.

So always got some problems like ' Interface 10GE2/15/0/46: High bandwidth usage ( > 95% )', in fact, as a 10G interface, it's just a half of badnwidth usage.

I changed my item prototype of interface bits received/sent to 64 bit counter like 'net.if.in[ifHCInOctets.{#SNMPINDEX}]', will the speed prototype still have to change to 64 bit counter? and how to?

Thanks a lot.


BTW, I noticed the Template Module Interfaces Simple SNMP has a description as:

MIB: IF-MIB
An estimate of the interface's current bandwidth in bits per second.
For interfaces which do not vary in bandwidth or for those where no accurate estimation can be made,
this object should contain the nominal bandwidth.
If the bandwidth of the interface is greater than the maximum value reportable by this object then
this object should report its maximum value (4,294,967,295) and ifHighSpeed must be used to report the interace's speed.
For a sub-layer which has no concept of bandwidth, this object should be zero.

may be I have to change it to another mid?

[Atsushi]

Did you change the SNMP OID as well?

[Waret]

Hi. I solved this problem by changing the OID to "1.3.6.1.2.1.31.1.1.1.15.{#SNMPINDEX}". I monitored the throughput. I also added the preprocessing "Custom multiplier = 1000000". Maybe this information will help someone.